Source code for

import datetime

from django.forms import ValidationError
from django.forms.fields import RegexField, Select
from django.utils.translation import gettext_lazy as _

from .mk_choices import MK_MUNICIPALITIES

[docs]class MKIdentityCardNumberField(RegexField): """ A Macedonian ID card number. Accepts both old and new format. """ default_error_messages = { 'invalid': _('Identity card numbers must contain' ' either 4 to 7 digits or an uppercase letter and 7 digits.'), } def __init__(self, **kwargs): kwargs['min_length'] = None kwargs['max_length'] = 8 regex = r'(^[A-Z]{1}\d{7}$)|(^\d{4,7}$)' super().__init__(regex, **kwargs)
[docs]class MKMunicipalitySelect(Select): """ A form ``Select`` widget that uses a list of Macedonian municipalities as choices. The label is the name of the municipality and the value is a 2 character code for the municipality. """ def __init__(self, attrs=None): super().__init__(attrs, choices=MK_MUNICIPALITIES)
[docs]class UMCNField(RegexField): """ A form field that validates input as a unique master citizen number. The format of the unique master citizen number has been kept the same from Yugoslavia. It is still in use in other countries as well, it is not applicable solely in Macedonia. For more information see: A value will pass validation if it complies to the following rules: * Consists of exactly 13 digits * The first 7 digits represent a valid past date in the format DDMMYYY * The last digit of the UMCN passes a checksum test """ default_error_messages = { 'invalid': _('This field should contain exactly 13 digits.'), 'date': _('The first 7 digits of the UMCN must represent a valid past date.'), 'checksum': _('The UMCN is not valid.'), } def __init__(self, **kwargs): kwargs['min_length'] = None kwargs['max_length'] = 13 super().__init__(r'^\d{13}$', **kwargs)
[docs] def clean(self, value): value = super().clean(value) if value in self.empty_values: return value if not self._validate_date_part(value): raise ValidationError(self.error_messages['date'], code='date') if self._validate_checksum(value): return value else: raise ValidationError(self.error_messages['checksum'], code='checksum')
def _validate_checksum(self, value): a, b, c, d, e, f, g, h, i, j, k, l, checksum = [int(digit) for digit in value] m = 11 - ((7 * (a + g) + 6 * (b + h) + 5 * (c + i) + 4 * (d + j) + 3 * (e + k) + 2 * (f + l)) % 11) if 1 <= m <= 9 and checksum == m: return True elif m == 11 and checksum == 0: return True else: return False def _validate_date_part(self, value): daypart, monthpart, yearpart = int(value[:2]), int(value[2:4]), int(value[4:7]) if yearpart >= 800: yearpart += 1000 else: yearpart += 2000 try: date = datetime.datetime(year=yearpart, month=monthpart, day=daypart).date() except ValueError: return False if date >= return False return True